Windows 7 ?

Can i use windows 7 professional sp1 with this system ?
And can i play crossfire then again ?
And i dont know how to update the bios from m.b. because i have at the moment a problem with my graphic card when i watch videos or flash games its freeze after some seconds.
Graphic card:gigabyte atı radeon hd4650
Here my system photo(dxdiag):

no,Its working fine but In some games like:crossfire before windows 7 i haved in xp 110ping but at the moment 180 why ?
i install it my DVD Reader/Write not working then i put the dvd in Laptop and from my deskop pc i do it .)

no,Its working fine but In some games like:crossfire before windows 7 i haved in xp 110ping but at the moment 180 why ?
i install it my DVD Reader/Write not working then i put the dvd in Laptop and from my deskop pc i do it .)

Ping is entirely unrelated to graphics cards. Are you using wireless, downloading stuff and/or is your connection bad? I sincerely doubt its related to your computer hardware.